Skip to main content
stevenvh's user avatar
stevenvh's user avatar
stevenvh's user avatar
stevenvh
  • Member for 13 years, 6 months
  • Last seen more than a week ago
309 votes
Accepted

Why does USB have 4 lines instead of 3?

296 votes
Accepted

USART, UART, RS232, USB, SPI, I2C, TTL, etc. what are all of these and how do they relate to each other?

102 votes
Accepted

Tradeoffs when considering SPI or I2C?

89 votes
Accepted

Do I really need resistors when controlling LEDs with Arduino?

85 votes

What is the difference between \$V_{CC}\$, \$V_{DD}\$, \$V_{EE}\$, \$V_{SS}\$

73 votes
Accepted

What's this importance of datasheets?

72 votes
Accepted

What is the ppm in the crystal oscillator?

64 votes
Accepted

What is the basic difference between AM and FM radio?

62 votes
Accepted

Crystals, Oscillators, and Resonators. What the difference?

60 votes
Accepted

What's the third wire on a piezo buzzer?

60 votes

Why exactly can't a single resistor be used for many parallel LEDs?

56 votes
Accepted

How can I detect a power outage with a microcontroller?

55 votes
Accepted

Why are things like RESET/MCLR active low on most ICs?

53 votes

Choosing power supply, how to get the voltage and current ratings?

53 votes

What is the usage of Zero Ohm & MiliOhm Resistor?

52 votes
Accepted

How can I use a 12 V input on a digital Arduino pin?

51 votes
Accepted

What's so great about ARM?

49 votes
Accepted

Why are lightbulbs considered resistive load?

47 votes
Accepted

Why V rms instead of V average?

46 votes
Accepted

Is a current-limiting resistor required for LEDs if the forward voltage and supply voltage are equal?

45 votes
Accepted

What is the practical difference between watts and VA (volt-amps)?

45 votes
Accepted

Noise and what does V/√Hz actually mean?

44 votes
Accepted

What exactly is a current source?

43 votes
Accepted

Why is three-phase offset by 120 degrees?

43 votes
Accepted

Correct formula for LED current-limiting resistor?

42 votes
Accepted

Least expensive way to boost DC voltage

42 votes
Accepted

Just chopped a cable, is red power, black ground?

41 votes
Accepted

Is there any reasoning behind component names?

41 votes

What kind of components are black blobs on a PCB?

40 votes
Accepted

How to invert a digital signal

1
2 3 4 5
61